Double cutting tool for planers



Aug. 28, 1923. i 1,466,355

. J. D. DUSENBURY DOUBLE CUTTING TOOL FOR PLANERS Filed July 51. 1920 2 Sheets-Sheet 1 firwara Cu? Forward C208 Aug; 28, 1923. Q 1 3,466,355

J. D. DUSENBURY DOUBLE CUTTING TOOL FOR PLANERS 2 sheets-sheet 2 w J I wen/3 23/ Patented Aug. 28, 1923.

-'"1 m im g 4 ems boosts icue 'r'rne root ron rrilennns- I r Appficetiozi filed Ju lj 3 1, i920. fjs'eri rnb. 400,365. r

T HZZ whom it 71205 31 concern Be it known that l. Josnrrr D. Dustin'- BURY? a citizen of the United Fit-ates. residing: at Newton. in the county of Middleseri end'State of hiizzssachusetts, have invented new and useful l niprovenients in Double Cutting Tools for Flaners, ofwhichthe following is s speciation.

My invention relates to planing; tools'tor metal and specifically double ecting cut-- ters, known d pler; planing tools. in

planing machines, the tool is mounted above the work table or platen, which has a re ciprocntory movement back and forth under the tool. The workis placed on thisltehle and as it passes under the tool, a chip is out therefrom extending the whole length of the work. 7

Either a. single acting or double cutter may he used. 111' the case of a single acting, cutter, there only one tool and this tool cuts on the torward movement of the table only, while case of a double acting cutter, there:

are two tools and a cut is inude both on the forward moven'ient of the table find;

At the end of {L on the reversemovement. forward and reverse inoven ent oi the table,

the cutter is shitt'ed transversely of: the line oi travel of" the table. so that at the next movement of the tubleu new cut will be made parallel to the preceding one. Each out; is made to overlap the preceding. a certain amount so that no por ions will be left unplaned. it 5. desirable to vary the amount of this overlap in certain cases and for cerein kinds of work. nlished with single acting cutters by varying the distance the cutter is shitted trans veisclv of the table. after the completion of i In the case of douhle acting cut'-' ters in use at present. the overlap tor the refeach i out turn out with respect to the forward cut is of a fixed width and it is the object of my" invention to produce means wherein/dire overlap of the return cut'over the "forward edouble acting cutter may 1 be new.

cut in the case of be varied.

Another object is to produce a device 4 r struction the tools jecent theexis oi'i thQII SUDPOI'iZ and on p'osite sides thereofequally spaced therewhereby a tool holder may be readily ate tuched to the clapper of :i plainne machine. Referring now to the drawings,

' Figure l is an elevation of the tool holder acting This may be eccoruthe cutter.

angulerly placed grooves therein in which.

thetool may be mounted at an angle to the worlrin cutting ralsed surfaces.

F 1gurej'9 shows in front elevation my duplex tool holder secured to the clapper of-e planing machine and a forln of brace for steedying the clapper; e

FigurelO'is a side elevation thereof; Figure 11 shows in 'detztile form of brace. Figure 12 is :1 detail of a slightly differ ent form of brace member. v i

Figureslii and 1-1 show details ot the de vice shown in Figure 12. v v

Figure 15 shows still anotherform oi the brace.

reference numerals. 1O designates a head or clapper box, in whlch are pivotelly mounted cleppers 12-end 12, inwhich suit able cutting toolsli end 11 may he adjustr 1 V 90 Extending from the upper side of the" clapper box is a shank or stem 13, prefereeblv secured.

lily cylindrical, and provided wit-hie reduced screw threaded portion at itsupper end. This steniis mounted for angularh l= JdStD'Kifit 1n :1 'supportlng sleeve 14, which is supported on the plening niachine in any manner usual or suitable in or ten such a.-

;nechine with the necessary provision for relative cutting nnd feeding movement be tween the work #HITYlTlQf table or platcnond This feature of angular adjust- Inent of a double acting cutter, believe to It will be noted also that with this con are mounted closely edspring, of each tool, due to its distance from I will: now describe my device in deteih lOfGTfllnQji'O thevaiious parts thereof, by

the axis of the support, is small and the same for both tools. 7

Threaded on to the reduced end of the stem 13 is a nut which is provided with a flange adapted to bear on the upper end or the sleeve 14;. By means of the nut 23;, the

fording an extended surfa ce., as an abutmentv for the clapper box, This flange 24 and the top of the clapper box may be roughened or provided withteeth in order'to more effectively hold the head in adjusted position relative to the slee've. r

In effecting the angular adjustment of the cutting tools, the nut 23' is loosened andthe head 10 turned co-any. position'desired in which the respective cuts of theforwardcua ting tool and the return cutting tool will overlap. Such a position, is illustrated in Figure 5 of the drawings, in which A-A represents the direction of travel of the platen or work table, and BB is'the line through the center of the cutters lying atan angle to the line A'-A. It will be notedthat each of the cutters extends slightly across the line A-A and the sum of these-extensionsrepresents the distance that the return cutwill overlap the forward cut.

tions the work table is traveling in making It will be The cuts, which the tools will make when in this position is diagrammatically represented in Figure 6, in which. the line Y indicates the direction in which the tool is fed across the work table or platen, and the arrows m, m, respectively indicate the direc the forward and return cuts; noted that the positions of the forward cut and the succeeding return cuts are such that,

they slightly overlap. It will. be noted also that the next forward cut'in a similar manner, overlaps the preceeding return cut and so on.

the arrow, transversely of the travel of the work, a distance equal to the sum of a for-v ward and return cut minus the space of two overlaps; thisdistance is indicated at f of' Figure 6. The clappers l2 and 12 are provided with grooves 20 in which the tools are held for longitudinal and angular adjust-- ment by means of bolts 16 passing through After each return cut, the tool is moved along the line Y in the direction of lye-66,355

Figure 1, will be in cutting position as the work table moves forward i. e. to the right,

and the tool 11 will be free to dragon the :surface of the work 111 an operative posit-ion. Y W hen the work table moves n the opposite direction the reverse actionwill take place.

In Figure 7, I showthe ustm'ent of the.

, tool for cutting rising surfaces: lt w-ill be noted that the tooliirthis case-isadjusted to an an de of inclination to the surface beinjr" *1 i V r) cut. This is necessary to enable the cutter which is noperative on either the'forward or return stroke-as set forth abovefto swing free from the work thereby avoiding scarring or otherwise damaging thework. The angular adjustment of the tool to the rising surface may be accomplished through the overhead adjustment device of the planen l'nthe operation of cutting a rising surface, the feed is downwardly, and the tool which cuts on the forward stroke is adjusted to extend below the tool which cuts'on the re turn stroke, a distance equal tothe width of a cut minus the width of an overlap. In

other" respects than those set forth above,

the cutting on a rising surface is the same rnent of the cutters to a rising surface, in-v dependently of the tool holder in which they areinounted, The. clapper designated 12* is provided with a gT'OOVG' 20* extending longitudinally of the clapper. 'Diagonally crossing the grove 20* and at angles of less than 90 thereto, are grooves 20 'and 20" designed to receive a cutter for cutting ris ing surfaces. The cutter is placed in one of these grooves 20 and 20" according as the rising surface is a'left hand or" right hand surface, roughly adjusted to the rising sur face, the fine adjustment of the cutter to the surface being'e-ft'ected by adjusting the tool in which the cutters are mounted through the overhead adjustment. r

In the cutting of rising surfaces, it will be obvious from the above construction that the tools may be angularly adjusted in the sleeve l-fl to compensate for any unevenness or irregularity of the cuts of the two tools as'primarily adjusted; v

The usual planing 'n'iachine provided with a cross feed for moving the meleecured thereon transversely of the work table (not shown). The cross feed comprises a carriage or saddle 30' (see Figs. 9. and 10) mounted for slidable ad ustment" on guideways 30 and is provided with an adjusting screw 30". The vertical adjust ment of the tool to and from the work is provided for by means of a slide 31 vertically adjustable on a guideway 32 by which may be known as the primary angular I adjustment.

A clapperbox 33 is swiveled, to the lower end of the slide 31 to provide an additional angular adjustment in the nature of a swivel in concentric with the swivel of the elapperbox and bolts 37 secured in the slide 31 and projecting. through the slot 86 and nuts 38 l are. provided to hold the clapper box in angular adjustment to the slide 31. W'ithin'the clapper box, a clapper 34 is pii 'otally mounted by means oit-a bolt 3% and extendingtransversely of the clapper are straps 39 and 40 adjust-able on bolts l2 to hold a tool on the clapper. Nuts 41 are threaded on the bolts to hold thestraps in adjusted positionp i V 7 It is; desirable to att-aehthe tool holder to the clapper of the machine in the same manner that an ordinary tool is attached thereto, but if the tool holder should be secured tothe elapper 34 without means-for holding the clapper against pivotal move.- ment, a double clapper action would result on the forward cut which 'would'sbe' objectionable. ln order'toelimi ate this obection l have'devised a 'means'i'or clamping the clapper 34- ot the machine against piv otal movement in its clapper boy-which may be readily attached or detached to any ilaning. machine now in use without altaxation of the machine.

one torniot this device is shown in Figs. 9 10 and-ll and comprises a bracket 43 and a brae 44. The bracket is provided with. a triangular flange 45 having "formed the-rcin notches 46 adapted. toreceive the bolts "For 'reii' ovably securing; the bracketto slide Ell. A. set sr i'ovi' 45 is adjust-ably fitted in an a 'ierture the'apex of the flange 45, the end, 0'! which is adapted to rest against the/slide to steadvthe bracket and theouter endroit the bracket is providedkvdh :a re

ccss l3? on its under side.@ The brace 4% comprises a tubular member 47 in theupoer end of which is inserted plii '4-8 provided int rmediate of its ends with, an outst-andin flange 4-9 which s ada 'ited to rest on one end of the tuhular men'iber. end-of theplug is a spherical. head [50 adapted to lit in the recess 43? novidine universal movement of the. brace ilu the'opposite Gllil'fill the bore the tube'el' may be inserted the sc-rewthreaded end of a bolt 51, the opposite end of which is provided with a head 52 havingia notch 52 therein. The head 52 isadapted to abut gainst suitable means on the clapper. as they strap 40. with said [means preferably resting within the notch 52 thereof. In this manner the clapper will be held positively 0n the upper may, be readily attached to planer and by.

jeans thereoiamy duplex tool holder may be attached to the clapper of a planing machine 111 I the same manner as, any ordinary tool By means of the adjustment ot-the brace member thebracin'g device may be adapted to variations in length of clapper'boxes of various planing machines, and by means of the-ball and isocketco inect-ion with the bracket arm remains effective when. the clap per box is adjusted at anan'gle to theslide. The bracket may be allowed to remain permanently attached to the bolts 37 when my tool holder is removedwithout'interterence with the operation otany other tool vantage of securing-The clapper 34 by the; above means isthat there is: provided thereby; a slight give or elasticity to the bracing of the clapper which has a. tendency to relieve the shock against thereturntool. in coming in contact With theworlr; T he importance ofthis will beappr-eciated when: t s understoodflthat t lie'return stroke of the worlr table is ordinarily more ia 'iid than the forward stroke and therefore the shock on the return. tool is greater.

The specific yiormuof my bracing. device to 11 inclusive without deoartin trom the .l b

spirit of the invention, as; "for instancc the stem of the plupgf l8 maybe swiveled to the bracket 43 by means ofapin 55 (seev Figs. 12 13, andl4).- The-notch 56 in the head 52- 0i? bolt 51in this'case is preferably curved so as topositii el w,r: 1-ip the strap 48 inany angle of adjustment of the clapper box 33. Or brace 44"} ofthe form shownin Fig. 15"inay bepr'ovided in which the bolt. atthe lower end i.s, di s 3ensed withand a tubular formed in its lower end adapted to. fit the strap 40; In this form of the device the; ad

justment in length may-be accomplished; by

means of-ajscre iv threaded bolt ls having a nut 53 adjustably. mounted thereon, said nut being adapted'to reston the upper end ot the tubularuiember. The upper end of the nut is preferably provided witha' head 50 having; a rounded uppersurtace adapted for. universal-movementn asocket 4C3 n the bracket 48. W

lVhile this inventionhas been-described as 7 applied to a planer it will be quite evident to those skilled in the art that a similar 0011 may vary from that illustrated in. Figs. 9:

member 47 is provided having a notch 52 v cutting tools, means for carrying said tools struction might be applied to shapers,

desired, or to any machine having planular traverse between the work and tool.

Having thus explained the'natur'e of my said invention and described a wayjof mak ing and 'usingthe'same, altho without attempting to set forth all of the forms in which-it may be made or all of the modes of its use, what I claim is Lln a planing machine having a pair of in a common plane, said means being rotatively ad ustable to cause this plane to assume an angle to the direction of'cutting stroke of said tools. 7

In a duplex planing 'mechanlsm, a

clapper box, a stem extending therefrom, two cutting tools mounted in said clapper box, a sleeve in which said StQIH'IS swivelled for adjustment therein, and means to hold the parts in adjusted position. i

' 3Jln a duplex planing mechanism, a

'7 clapper box, a stem extending therefrom,

two cutting tools acting oppositely to one another mounted in said clapper box, a sleeve in which said stem is mounted so as to be free to turn about its axis to adjust the position of the cutting tools relative to each other and to the lineof travel of the work table, and means for holding the parts in adjusted position.

l. Ina duplex planing mechanism, ahead,

a relatively movable work table, a clapper box carried by said'head, and cutting tools carried by said box and adapted to cut, one on the forward movement of the work table and the other on'the return movement thereof, said clapper box beingadjustable about an axis angularly. disposed relative to said '1 table so that the overlap of the forward and reverse cuts maybe varied. 5. ln a duplex planing mechanism, a pair of cutting tools-actmg to cut on reverse d1- rections of relative movement between them and the work, and means whereby the tools may be adjusted as a unit to vary the overlap of the cutting paths of the tools. 7

6. A device for holding aclapper against pivoted movement comprising a relatively fixed bracket, a member havingoneend' pivoted tosaid bracket, a sleeve'mounted thereon, abolt having a head at one end and screw threads at the opposite'end extending into the sleeve, a notch in the headfor engaging over a strap or the hire on sand clapper, and

a nut on the screw threaded end of the bolt for adjusting the length of the device.

. 7. In combination with the tool carriage oi a planing machine having a clapper box thereon, and a clapper pivotally. mounted in said clapper box, of means for holding'said clapper against pivotal movement compris ing abracket'arm secured to the carriage, a member comprismg a sleeve having an ex tension thereon. pivoted to said bracket, bolt having one end scr w threadedito' said sleeve, and ahead at the other end of said bolt having a notch thereinadapted to fit 7 over a member on said clapper, said screw threaded end carrying a nut, whereby the length of said means may be adjusted,-

8. In combination with the tool carriage of a planing machine having a clapper box thereon and a clapper mounted in said cl apper box, of means torclamping said clapper against pivotal movement comprising a bracket and a brace, said bracket being provided with'a semi spherical socket, and said brace comprising a tubular member having a spherical head at one end thereof adapted to fit Said socket, a bolt having a notched head at one end, and ascrow threaded end adapted to be lnsertcd into the lowerend of said tubular member, anda nut on-said threaded portion stationary comprising a brace adjustable to length, abracket adapted to be'secured to the planer againstwhich one end'of the brace is adapted to rest, theopposite end of thc bracebcing provided with a'jnotch to receive a projecting portion .on the clapper.

. ,11. In a planing machine having a pair of cutting tools, means for carrying said tools in a common plane, said mean'sbe'ing adjustable to move the tools in opposite, directions "to cause this plane to assume anangle to the direction of cutting stroke of said tools;

12.1111 a planing machine,a support traversable in opposite directions and turnable about an axis, and a pair of tools'carried by said support and yieldable toward said axis,v

their active portions facing toward said axis whereby each tool is active only when pulled against the work. 7

13. In a planing machine, a support turnable about its axis, and'a pair'of oppositely facing tools carried by saidlsupport to turn therewith closely adjacent saidaxis.

14. In a planing'machinefa support turn- 7 able about its axis, and a pair of oppositely facing tools carried by said support toturn therewith closely adjacent said axis 7 and equally spaced on opposite sides thereof.

In testimony 'whereofil have afiixed my signature. 1 r Y 1 JOSEPH nnsnnnnnv. 

